html,
body {
  margin: 0;
  width: 100%;
  height: 100%;
  display: flex;
  background-color: #e8e0cb;
}

$color: #f47023;

.container {
  margin: auto;
  width: 200px;
  height: 200px;
  position: relative;
  .circle {
    border-radius: 50%;
    box-sizing: border-box;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border: 2px solid $color;
    &.item {
      animation: round 3s linear infinite;
      &::after {
        content: "";
        position: absolute;
        top: 0;
        left: 50%;
        transform: translate(-50%, -50%);
        width: 13px;
        height: 13px;
        background-color: $color;
        border-radius: 50%;
      }
    }
    &:nth-child(1) {
      width: 50px;
      height: 50px;
      background-color: $color;
    }
    &:nth-child(2) {
      width: 100px;
      height: 100px;
      background-color: transparent;
      animation-duration: 2s;
    }

    &:nth-child(3) {
      width: 140px;
      height: 140px;
      background-color: transparent;
      animation-duration: 2.5s;
    }

    &:nth-child(4) {
      width: 180px;
      height: 180px;
      background-color: transparent;
    }
  }
}

@keyframes round {
  100% {
    transform: translate(-50%, -50%) rotate(360deg);
  }
}
